Work out data portal embedding

[curran]

This visualization will fit to its window, so its embed in the data portal should have a fixed height configured.

Or, we can change the behavior such that the height is fixed internally, in which case we can use

https://github.com/davidjbradshaw/iframe-resizer

<script src="https://unpkg.com/iframe-resizer@3.5.15/js/iframeResizer.contentWindow.min.js"></script>

[curran]

This is what a first pass embedding looks like